Cutter-head.



L. P. HESS.

GUTTER. HEAD. APPLICATION FILED SEPT. 20, 1911.

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.UNITED sTATns TATENT ovarica.

-'I.0UIs IQHnss, 4or ANs'rED, WEST VIRGINIA.

'GUTTER-HEAD.

To all whom t may concern: Y

Be it known that I, LoUIs F. Hass, a citi Zen of the United States,residingat Ansted, in the county of Fayette and State of lVest Virginia,have'invented anew and-useful Cutter-Head, `of which the following is aspecification.

The objects of the present invention are, to provide a cutter head for amining machine, having a spiral rib so constructed that the head Will bethoroughly eflicient in retracting the dust, a packing of the dustagainst the rib being avoided.

A further object of the invention is to provide acutter head for amining machine, having a spiral rib so Constructed that it will serveasl an unusually strong elementy in which the cutters may be mounted.

lith the foregoing and A'other objects in lview, which will appear asthedescription proceeds, the invention resides in the combi` nation and'arrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of invention herein disclosed can be made within the scope ofwhat is claimed without departing from the spirit of the invention.

In the accompanying drawings,-Figure 1 shows in side elevation, a cutterhead constructed in accordance with the present invention, parts beingbroken away; Fig. 2 is a transverse fragmental section upon the line A-Bof Fig. 1; Fig. 3 is atransverse section upon the line C-I) of Fig. 1;Fig. t'is a fragmental longitudinal section of the cutter head; and Fig.5 is a fragmental side elevation of the cutter which is mounted in thforward end of the head.

In carrying out the invention there is providedl-asa primary andfundamental ele-` ment, a cut-ter head denoted generally by thenumeral 1. The cutter head 1 tapers from its' rear end toward itsforward end',n as clearly shown in Fig. 1. In the rear end of the head 1there is an axial bore 2, adapted to receive the shank 3 of the drivingelement, the shank 3 being held in place in the head 1 by threading, orin any .other satisfactory manner. In the forward end of the head 1there is an axial bore 4, adapted to receive a bit 5, preferably apointed tool, the cutting end of which is turned slightly in thedirection of rotation of the head 1. The bit 5 may be held in place inthe head 1 by means of a set Specification of Letters Patent.

Application ledjeptem'ber 20, 1911. Serial No. 650,438.

- ratenteaiuar. 5,1912.

screw 6, threaded into the head 1, and adapted to engage the.bit 5. Thehead 1 is circumscribedby a spiral rib. The front face 7 and the rearface 8 of the co-nvolutions of this rib slopein opposite directions,longitudinally7 of thehead, as

Fig. 1 will. clearly show.- The angle between f the front face 7 and theaxis of the headl lis greaterthan the angle between the rear face `8 andthe axis of the head 1. The front face 7 of one convoltionof the spiralrib intersects the rear face 8 of the next adjacent convolution, asshown at 9. At this point 9, the

faces 7 and 8 meet at an obtuse angle.' rlhe front face 7.of the spiralrib, is pierced by a series of tool-receiving seats 10. Noting Fig. 2 itwill be observed that each seat 10 is located in a radial plane passingthrough the longitudinal axis of the cutter lhead 1. Referring to Fig.4, however, it will be noted that the seats 1Q are disposed vat an`acute angle to the axis of the cutter head 1. The front face 7 of thespiral rib is pierced by tangential openings 11, thev openingsllconimunicating with the -socket 10. Int-0 the openings 11, set screws 12are threaded`,fthe

outer ends of the openings llbeing eirl,arged.

as shown zit-14, to receive the heads 15 of the screwsv 12. The sockets10 are adapted to receive the cutters '16, the cutters being retained inthe head 1 by the screws 12, as will be readily understood from aninspection of F ig. 2. In the present instancethey are'shown as ofangular configuration. j j c Owing to the. fact that the faces 7 andf8.

The cutters 16 may be of any form.y

slope in opposite directions,V and owing'to r vthe fact that the face 7'offene convolution intersects the face 8 atan obtuse angle, the.dustcannot become packedgatt'he. point 9.

The, dust cannotvbecome packed against theA convolutions of the spiralrib, as is the casev when the spiral ribl isy fashioned Withtwolparallel faces disposed, at right angles to the laxis'of the head.Although the faces 7 andI 8 meet at an obtuse angle as shown atj9, the

ioo

spiral rib withal Willbe effectiveto-.keep lin motion, and to retract,thedust, so that "tl1.e'

cutter. head will clear itself.. f

Since the front face 7 is rearwardly in# clined with respect to the4axispof the head,

and since the socket 10 enters the .face 7, a mass of solid materiallies between thetool 16 and the axis of thehead, the mounting of thetool beingl rendered thereby' 'Secura-fil@ the danger of the-toolbreaking out of the socket being reduced vto a minimum. The rlb 1stherefore of far greater strength,

considered as a tool-receiving element, than 1s a rib the front and rearfaces of which are .parallel and disposed at 'right angles to the jaxisof the head. The mounting of the tool ,is made more secure, further, byreason of but at an acute angle to the axis. Obviously,

the lfact that each socket l0 is located in a common plane with the axisof the head l,

l packing of the ldust-.against the rib being 'Ii-avoided; and the toolswill be retained securely in the rib, owing to its peculiarconstruction, and owing to the manner in which the tools are insertedthereinto. One of the marked improvements effected by this cutter hea'dis that it will retract the dust without agitating the dust and causingit to be suspended `in the air of the mine. Then va cutter head having aflange which outstands at a right angle yto .the axis of the head, is

rotated at ahiglr-sp'eed, the dust is retracted with unnecessary speed,and 1s thrown rear- .wardly 1n violence, which causes the finer and moredangerous particles of the, dust. to/

be suspended in the air of .the milita;y It has been found in practicaloperationgffthat the cutter .head herein disclosed, may rotated ata-high rate of speed without'agitating the dust unduly, and withoutwhirling it tangentially away from the cutter; to mingle with the air ofthe mine. v I

Having thus described the invention ./what is claimed is LA' cutter headfor a mining machine,

having aV spiral rib, the front and rear faces of the convolutions ofwhich slope in opposite directions longitudinally of the head; and acutter carried by the front face of the rib.

2. A cutter head for a mining machine, having a spiral rib, the frontand rear faces present invention will clear itself readily,l

Asite directions longitudinally of the head, -the angle between thefront face and the axis of the head being greater than the angle betweenthe rear face and the axis of the head; and a cutter carried by thefront face of the rib.

3. A cutter 'head for a mining machine, having a spiral rib, the frontand rear faces the rear face of the next adjacent convolution; anda'cutter carried by the front 'face of the rib. i

et. A cutter headhaving a spiral rib, the

which slope in opposite directions longitudinally of the head, the'anglebetween the front face and the axis of the head being greater than theangle between the -rear face and the axis of the head, the front face ofone convolution intersecting the rear face of the next adjacentconvolution; and a cutter carried by the front faceof the rib.

5. A cutter head for a mining machine, having a spiral rib, the frontand rear faces site directions llongitudinally of' the head; the frontface being pierced by a socket located in a radial plane passing throughthe'longitudinal axis of the head and dis-v posed at an acute angle Vtosaid axis.

G'. -A cutter head for a mining machine, having a spiral rib the frontand rear faces of the convolutions of which slopeV in oppo# ,the anglebetween the front face and the axis of the head being greater than theangle between the rear face and the axis of the head, the front face ofone convolution intersecting the rear face of the next arl-jacentconvolution; there being 'tool-receiving sockets piercing the front faceof the rib, each of which sockets is located in a radial plane passingthrough the longitudinal axis of the head, and disposed at an acuteangle to said axis.

In testimony thatl I claim the foregoing as my own, I have hereto aiixedmy signature in the presence of two witnesses.

' LOUIS F. HESS.

lVitnesses O. G. TAYLOR, J. H. Con'r.

front and rear faces of the convolutions of .ofthe convolutions of whichslope in opp'cof the convolutions of which slope in op'poof theeon\'olutions of which slope oppo-H site directions, longitudinallyy ofthehead, the front face of one convolution inter'secitingv sitedirections longitudinally of the head,

